论文标题
基于动态状态估计的感应电动机负载的保护
Dynamic State Estimation-Based Protection for Induction Motor Loads
论文作者
论文摘要
确保保护装置协调对于维持弹性和提高大型微电网的可靠性至关重要。但是，在设计保护系统时，逆变器交织的生成构成了重大挑战。由于缺乏故障电流，传统的时电流防护设备不合适。目前的行业实践是迫使所有逆变器在故障期间关闭，这可以防止大型微电网以弹性和可靠的方式运行。已经提出了动态状态估计（DSE）以保护线路，并且最近用于保护负载总线或微电网的下游径向部分。但是，只有用DSE测试了带有电阻式感应载荷的被动载荷，即使在故障期间动态载荷的行为（例如感应电动机或电源电子）可能会有很大差异。本文考虑了将DSE应用于保护三相感应电动机的负载总线的情况。
Ensuring protective device coordination is critical to maintain the resilience and improve the reliability of large microgrids. Inverter-interfaced generation, however, poses significant challenges when designing protection systems. Traditional time-overcurrent protective devices are unsuitable on account of the lack of fault current. Present industry practice is to force all inverters to shut down during faults, which prevents large microgrids from operating in a resilient and reliable manner. Dynamic state estimation (DSE) has been proposed for line protection, and more recently for the protection of load buses or downstream radial portions of microgrids. However, only passive loads with series resistive-inductive loads have been tested with DSE, even though the behavior of dynamic loads -- such as induction motors or power electronics -- may differ significantly during faults. This paper considers the case of applying DSE to protecting a load bus serving a three-phase induction motor.
